#include "bsp.h"
#include "utils_timer.h"
#include "bsp_timer0.h"

void iotx_time_start(iotx_time_t *timer) {
  if (!timer) {
    return;
  }

  timer->time = UptimeMs();
}

uint32_t utils_time_spend(iotx_time_t *start) {
  uint32_t now, res;

  if (!start) {
    return 0;
  }

  now = UptimeMs();
  res = now - start->time;
  return res;
}

uint32_t iotx_time_left(iotx_time_t *end) {
  uint32_t now, res;

  if (!end) {
    return 0;
  }

  if (utils_time_is_expired(end)) {
    return 0;
  }

  now = UptimeMs();
  res = end->time - now;
  return res;
}

uint32_t utils_time_is_expired(iotx_time_t *timer) {
  uint32_t cur_time;

  if (!timer) {
    return 3;
  }

  if (timer->inspected != 1) {
    return 2;
  }

  cur_time = UptimeMs();
  /*
   *  WARNING: Do NOT change the following code until you know exactly what it
   * do!
   *
   *  check whether it reach destination time or not.
   */
  if ((cur_time - timer->time) < (UINT32_MAX / 2)) {
    timer->inspected = 2;
    return 1;
  } else {
    return 0;
  }
}

void iotx_time_init(iotx_time_t *timer) {
  if (!timer) {
    return;
  }
  timer->inspected = 0;
  timer->time = 0;
}

void utils_time_countdown_ms(iotx_time_t *timer, uint32_t millisecond) {
  if (!timer) {
    return;
  }
  timer->inspected = 1;
  timer->time = UptimeMs() + millisecond;
}

uint32_t utils_time_get_ms(void) { return UptimeMs(); }
